Mr. Brown on the Products of the Smta Manufacture. -~il 



Silica, 3-394 



Magnesia, 0*350 



Alumina, 0*846 



Iron, 3*129 



Water, 0*700 



Carbon, 7*998 



ritr.ti.iarine, 0*295 



Carbonic 

 Soda. Lime. Acid. Sulphur. 



Carbonate of soda, 35*640. ..21*120... — ...14*520... 



Caustic soda, 0*609... 0609... — ... — 



Aluminate of soda, 2*350... 1*504... — ... — 



Sulphate of soda, 1*160... — ... — ... — 



Sulphuret of sodium 1*130... 0905... — ... — ... 0*454 



Chloride of sodium, 1*913... — ... — ... — 



Ultramarine, 0*295... — ... — ... — 



3CaS+CaO, 29*172... — ...24*024... — ...10296 



Caustic lime, 6*301... — ... 6*301... — 



Sand, 4*285... — ... — ... — 



Sulphuret of iron, 4*917... — ... — ... — ... 1*786 



Silicate of magnesia, 3*744... — ... — ... — 



Carbon, 7*998... — ... — ... — 



Water (hygroscopic,) 0*700... — ... — ... — 



100*214 24*138 30*325 14*520 12-536 



It will be seen that, in the above analysis, I consider almost all the 

 soda to be united with carbonic acid, there being very little caustic soda. 

 Unger and others who have examined the soda balls, fall into the error of 

 supposing a large quantity of the alkali to exist as hydrate, and also of 

 always finding carbonate of lime. But if a portion of the ball soda be 

 digested in alcohol, and the alcoholic liquor carefully examined, it will 

 be found that it holds in solution a very small quantity of alkali, which 

 I consider to be as sulphuret. If, on the contrary, the soda balls con- 

 tained caustic soda, it would be immediately dissolved by the alcohol, 

 and we would obtain a strongly alkaline solution. This however is not 

 the case. But if the ball soda be digested in water, the liquid will be 

 found to contain a large quantity of caustic soda, which, however, can easily 

 be accounted for in the following way: — There exists in the ball soda a 

 large amount of caustic lime, and whenever water is added to it, a 

 decomposition takes place, — carbonate of soda and caustic lime becoming 

 carbonate of lime and caustic soda, — 



NaO C0 2 + CaO = CaO CO, + NaO. 



Some analysts have also found water of combination in ball soda ; that 

 is, water united to soda or lime. But this is impossible : for where does 

 the water come from ? The materials contain none. A small quantity 



Vol. II— No. 4. 6 



